A precast reinforced concrete composite slab without support
By setting hidden beams in the middle of the base slab and reinforcing members on both sides, the problem of traditional precast slabs requiring scaffold support is solved, achieving efficient and simplified cast-in-place construction, which is suitable for high-rise buildings or large-span scenarios.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGXI UNIV
- Filing Date
- 2025-06-05
- Publication Date
- 2026-06-09
AI Technical Summary
Traditional precast slabs require full-scale scaffolding or temporary supports for cast-in-place layer construction, resulting in long construction cycles, high labor intensity, and poor economic efficiency. Some improved solutions have complex structures and are difficult to support with formwork.
A hidden beam is installed in the mid-span area of the base plate to improve rigidity, and reinforcements are installed on both sides to enhance the rigidity of the base plate. The bracket support is eliminated, and a simple structural design is adopted.
It reduces the deflection and difficulty of cast-in-place construction, simplifies the formwork process, improves construction efficiency, reduces the use of materials and labor, and is suitable for high-rise buildings or large-span scenarios.
Smart Images
Figure CN224338484U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of concrete composite slabs, specifically relating to a precast reinforced concrete composite slab that does not require supports. Background Technology
[0002] Composite concrete slabs are a combined structural form integrating precast and cast-in-place processes, consisting of a precast concrete floor and a cast-in-place composite layer. Traditional cast-in-place concrete slabs rely on on-site formwork, rebar tying, and extensive wet work, resulting in long construction cycles, high labor intensity, and significant quality fluctuations. While fully precast slabs improve construction efficiency, their integrity, seismic performance, and ability to connect multiple floors still have shortcomings. Composite slab technology, through a "factory precast + on-site composite" model, effectively integrates the efficiency of industrialized precast component production with the integrity of cast-in-place structures, becoming one of the mainstream solutions for floor systems in modern prefabricated buildings.
[0003] Currently, traditional precast slab types include unribbed slabs, single-ribbed slabs, steel truss slabs, reinforced steel truss slabs, and cross-ribbed slabs. Their main disadvantage is that traditional composite floor slabs require full-span scaffolding or temporary support systems during cast-in-place construction to ensure the structural safety of the precast slab. This not only consumes a lot of labor and materials but also prolongs the construction period, making them particularly uneconomical in high-rise or large-span scenarios.
[0004] While some existing studies on improved precast slabs offer support-free capabilities—for example, patent publication number CN118547820A discloses a support-free high-performance reinforced concrete composite slab and its manufacturing method—these slabs are structurally complex and difficult to form, thus increasing construction difficulties. Therefore, there is a need to design a simple, support-free precast reinforced concrete composite slab. Utility Model Content
[0005] This invention provides a precast reinforced concrete composite slab without support frames to solve the technical problems mentioned in the background art.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A precast reinforced concrete composite slab without supports includes: a base slab; a supporting frame disposed within the base slab; a concealed beam for strengthening the rigidity of the base slab; the concealed beam disposed on the base slab; reinforcing bars disposed within the concealed beam; the bottom of the reinforcing bars within the concealed beam is located within the base slab, and its top protrudes from the surface of the base slab; and reinforcing members for reducing the deflection of the base slab; the reinforcing members are disposed on both sides of the base slab.
[0008] As a further improvement to the technical solution, the hidden beam is located in the middle of the base plate.
[0009] As a further improvement to the technical solution, the length direction of the hidden beam is consistent with the length direction of the base plate.
[0010] As a further improvement to the technical solution, the length direction of the reinforcing member is consistent with the length direction of the base plate.
[0011] As a further improvement to the technical solution, the reinforcing member is an angle steel; the reinforcing member is connected to the supporting frame inside the base plate; the reinforcing member is located inside the base plate.
[0012] As a further improvement to the technical solution, the supporting frame includes a steel mesh and a steel truss; the steel mesh and the steel truss are connected to each other; the bottom of the steel mesh and the steel truss is located inside the base plate; the top of the steel truss has the side of the hidden beam protruding from the base plate.
[0013] As a further improvement to the technical solution, the length direction of the steel truss is consistent with the length direction of the base plate.
[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0015] This application improves the overall rigidity of the base slab by setting a hidden beam in the mid-span area, thereby reducing the deflection of the base slab during the cast-in-place construction process. This can moderately increase the span of the base slab structure. At the same time, reinforcing members are set on both sides of the base slab to enhance the rigidity of both sides of the base slab, reduce the difficulty of cast-in-place construction, and make cast-in-place construction without the need for scaffold support. The overall structure is simple, the design is reasonable, and the formwork is simple, thereby reducing the difficulty of the manufacturing process. Attached Figure Description
[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 A structural schematic diagram of a support-free precast reinforced concrete composite slab provided by this utility model. Figure 1 ;
[0018] Figure 2 Structural schematic diagram provided for this utility model Figure 2 ;
[0019] Figure 3 for Figure 1 Top view;
[0020] Figure 4 for Figure 3 Sectional view at point AA;
[0021] Attached diagram labels: 1-base plate, 2-hidden beam, 3-reinforcing member. Detailed Implementation
[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those skilled in the art to which this utility model pertains.
[0023] The terms "first," "second," and similar words used in this utility model application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, unless the context clearly indicates otherwise, the singular forms of "an," "a," or "the," etc., do not indicate a quantity limitation, but rather indicate the presence of at least one. Terms such as "comprising" or "including" indicate that the element or object preceding "comprising" encompasses the features, integrals, steps, operations, elements, and / or components listed following "comprising" or "including," and do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or collections thereof. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0025] Example 1:
[0026] like Figures 1 to 4As shown, a precast reinforced concrete composite slab without scaffolding includes: a base slab 1, hidden beams 2, and reinforcing members 3; a supporting frame is provided inside the base slab 1, which can be cast from ordinary cement concrete, lightweight aggregate concrete, or recycled concrete; the supporting frame includes a steel mesh and a steel truss; the steel mesh is located at the bottom of the interior of the base slab 1, and the steel truss is connected to the steel mesh; the bottoms of both the steel mesh and the steel truss are located inside the base slab 1; the hidden beams 2 are set on the base slab 1; the hidden beams 2 are provided with reinforcing bars, the bottoms of which are located inside the base slab 1, and their tops protrude from the base slab 1; the hidden beams 2 are mainly used to strengthen the overall rigidity of the base slab 1, thereby reducing the deflection of the base slab 1 during cast-in-place construction; the top of the steel truss has a side protruding from the base slab 1 with the hidden beams 2 exposed; the length direction of the steel truss is consistent with the length direction of the base slab 1; the reinforcing members 3 are set on both sides of the base slab 1, and the hidden beams 2 are located between the reinforcing members 3; the length direction of the reinforcing members 3 is consistent with the length direction of the base slab 1.
[0027] like Figures 1 to 4 As shown, preferably, the hidden beam 2 is located in the middle of the base plate 1, that is, the hidden beam 2 is located in the mid-span area of the base plate 1; the internal reinforcement of the hidden beam 2 corresponds to the length direction of the hidden beam 2, and the hidden beam 2 is made of concrete; the length direction of the hidden beam 2 is consistent with the length direction of the base plate 1 to improve the overall rigidity of the base plate 1.
[0028] like Figure 4 As shown, preferably, the reinforcing member 3 is an angle steel; the reinforcing member 3 is connected to the supporting frame inside the base plate 1; the reinforcing member 3 is located inside the base plate 1, that is, the reinforcing member 3 is connected to the steel mesh and located above the steel mesh; the length of the reinforcing member 3 is consistent with the length direction of the base plate 1; the reinforcing member 3 is located on both sides of the base plate 1; when the base plate 1 is under load, the stiffness of the two sides of the base plate 1 is small and the deflection is high because there are no hidden beams or rib structures on both sides of the length direction of the base plate 1. Therefore, by setting the reinforcing member 3, the stiffness of the two sides of the base plate 1 is improved, the overall deflection of the base plate 1 is reduced, thereby reducing the difficulty of cast-in-place construction and making it possible to construct the base plate 1 without the need for support brackets.
[0029] Work style:
[0030] This application improves the overall rigidity of the base slab 1 by setting a hidden beam 2 in the mid-span area of the base slab 1, thereby reducing the deflection of the base slab 1 during the cast-in-place construction process. This can moderately increase the span of the base slab structure. At the same time, reinforcing members 3 are set on both sides of the base slab 1 to enhance the rigidity of both sides of the base slab 1, reduce the difficulty of cast-in-place construction, and make it possible to build a simple overall structure without the need for scaffolding support during cast-in-place construction. The design is reasonable and the formwork is simple, thereby reducing the difficulty of the manufacturing process.
[0031] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A precast reinforced concrete composite slab without support frames, characterized in that, include: Base plate (1); a supporting frame is provided inside the base plate (1); A hidden beam (2) is used to strengthen the rigidity of the base plate (1); the hidden beam (2) is set on the base plate (1); a reinforcing bar is provided in the hidden beam (2); the bottom of the reinforcing bar in the hidden beam (2) is located in the base plate (1), and its top protrudes from the surface of the base plate (1); A reinforcing member (3) for reducing the deflection of the base plate (1); the reinforcing member (3) is disposed on both sides of the base plate (1).
2. The precast reinforced concrete composite slab without support frame as described in claim 1, characterized in that, The hidden beam (2) is located in the middle of the base plate (1).
3. The precast reinforced concrete composite slab without support frame as described in claim 2, characterized in that, The length direction of the hidden beam (2) is consistent with the length direction of the base plate (1).
4. The precast reinforced concrete composite slab without support frame according to claim 1, characterized in that, The length direction of the reinforcing member (3) is consistent with the length direction of the base plate (1).
5. The precast reinforced concrete composite slab without support frame according to claim 4, characterized in that, The reinforcing member (3) is an angle steel; the reinforcing member (3) is connected to the supporting frame inside the base plate (1); the reinforcing member (3) is located inside the base plate (1).
6. The precast reinforced concrete composite slab without support frame according to any one of claims 1-5, characterized in that, The supporting frame includes a steel mesh and a steel truss; the steel mesh and the steel truss are connected to each other; the bottom of the steel mesh and the steel truss is located inside the base plate (1); the top of the steel truss has a side protruding from the base plate (1) with the hidden beam (2) protruding out.
7. The precast reinforced concrete composite slab without support frame according to claim 6, characterized in that, The length direction of the steel truss is consistent with the length direction of the base plate (1).